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Heidi Klum Previews Her Newest Halloween Costume and We Can't Figure It Out

By Alex Ungerman 5:01 PM PDT, October 2, 2015

Instagram

Heidi's favorite holiday is right around the corner!

The 42-year-old model is known for going all out for her Halloween costumes, but despite several Instagram posts detailing the creation of her outfit for this year, we can't figure out what she's gonna be!

"It's almost time for my favorite holiday! Costume prep time with the team at @prorenfx Can't wait for Halloween," Heidi wrote on one picture, where she seemed to be transforming into... a cake martian?

"I always like to surprise," Heidi told Us Weekly last year about why she keeps her costumes under wraps. "I don't like to tell people what I'm gonna do because people have a certain expectation of what it's gonna be like. I like to just show up and not tell anyone what it's gonna be."